Sirup pump



Aug. 30, 1932. A. c. HLCHER ET Al..

S IRUP PUMP Filed Nov. 25-1929 2 shefycsQ-shee'@y 1v Aug, 30, 1932. vA. c.. PaLcHER E15-AL sIRUP PUMP Filed Nov. 25, 1929 2 Sheets-Sheet 2 Patented Aug. 3o, 1932 unirsnsrarrs PATENT orifice ALLEN C'.' PILCHER ANDLAWRECE C. PILCHER, 0F LOUISVILLE, KENTUCY, ASSIGN- ORS,` BY DIRECT AND MESNE y ASSIGNMENTS, TO THE RUSS IVIANUFACTRIN CLvIPALZ',` OF CLEVELAND,v OI-IIO, A CORPORATION OF OI-IIO y sinn? PUMP Application led November 25, 1929. Serial No. 409,602.

Qur saidA invention relates to'V dispensing pumps of the type used in soda fountains designed to deliver measured or predetermined quantities or sirup or the like.

The invention aims to provide an extremely simple and inexpensive form of ypump which will bereliable in itsk action and extremelyV desirable in use. v Y

lThe invention further aims to provide a delo-vice ofthis character which will'be inoperative to deliver the sirup until the actuating handle has been actuated for a full stroke thereby preventing the delivery of less than the full amount.

The invention further aims to provide a construction in which the actuating member is normally operativelyconnected with the delivery member (pump piston) and will be automatically disconnected therefrom at *the extremity of the inward vmovement of the actuatingfor handlemember.

The invention also aims to provide simple economical means for preventing return of the actuating member prior to completion ot "its full stroke which will be reliable in action.

The invention further aims to provide means for releasing the pump piston and also orcontrolling the returnot the actuating ing defined by the claims appended hereto. r

What we at present regard as the preferred embodiment ci' the invention is illustrated in Y the accompanying drawings.

Figure l is a vertical section through 'our "improved pump with the sirup container indicated in dotted lines.

Figure 2` is a detail view partly in elevation and partly in section showing the actuaty-rod at they extremityof the inward stroke ,y

of parts hereinafter described,-invention being member and upper portion of the piston Figure 8 is a detail view in elevation of they piston rod locking and release means Figure 4 is a detail of the piston rod lool;- ing roller; Y K

Figure 5 is a section online 5 5 of Figure l; p Y Y Figure 6 is a section kon line 6 6 of Figure l; y p

Figure vaive; y Y

Figure 8 is ay section on line 8 8 of Figure l ;v

Figure 9 is a vertical section (with parts brokenaway and the piston rod shown in elevation) of the adjustable pawl releasing sleeve and its support;

Figure 10 is ya sectional detail of the sleeve 125er@ Figure 1.1 is an enlarged vertical section through the pump cylinder showing a modiiication of means for connecting the piston to its rod. n

rlihe pump is of thetypepwhich when in 7 is a detail view ofthe outlet check use7 is inserted in a container holdingthe sirup or other liquid to be delivered7 which container is indicated conventionally by the dotted lines l. A The pump comprisesa cylinder2 whichis carried at the lower end of vvertical columns 3 and 4, which are connected at their upper ends to a cover member 5 for the container, by which cover member the various parts of thel delivery mechanism are carried.

The pump cylinder contains a piston 6 provided with posts (ia controlled by an inwardly or upwardly opening check or {iut-ter valve Y 6b and is actuated by a piston rod 7 passing through anopening in the cylinder head 2h, such cyiinder head being preferably provided ywithan integral sleeve extension 2l to provide an elongated bearing for the piston rod. 'The column flis made hollow for delivery purposes and `terminates at its upper end ina delivery spout La while at its lower end where it joins the cylinder head it' is enlarged to form a valve chamber 4 within which is located an upwardly opening check valve 8, cooperating with a valve seat y formed Aat the upper end of the' port E2C-in'- the cylinder head which places the valve chamber in communication with the piston chamber or cylinder 2.

Normally the piston is held in elevated position as shown in Fig. 1 by a compression spring 9 surrounding the piston rod between the extension 2b of the cylinder head and a collar 10 pinned or otherwise secured on the rod. 1

From the arrangement thus far described it will be obvious that when the piston is forced down against the pressure of the spring sirup will be drawn into the space within the cylinder above the piston. On the return stroke of the piston7 under the action of the spring 9 the sirup is forced out of the cylinder into the delivery pipe.

For actuating the piston we provide theA i following mechanism The upper portion of the piston Vrod is guided in a cross head 11 by means of a collar or sleeve 12, having a bore fitting the pistonrod which is adjustably carried by the cross head, as by means of external screw threads engaging corresponding internal screw threads in a vertical passageway through the cross head and the upper end of the piston rod telescopically `engages a lengthwise opening 13?* of an actuating member y13 mounted to yhave rectilinear reciprocating movement as hereinafter described and normally held elevated-'by spring 14. The rod' is provided adjacent its upper end with recesses in which are located dogs yor pawls 7a which are normally spring pressed outwardly in position yto engage the bottom face of the actuating member, so as to hold the parts in operative engagement and ensurethat downward movement of the l actuating member will impart corresponding movement to the piston rod.` These pawls are spring pressed outwardly and have beveled outer faces whereby, when the piston rod is forced down until the pawls enter the sleeve or bushing-12 such beveled faces cause them to be forced into the recesses until they are disengaged from the lower face of the actuating member whereupon the piston rod is immediately forced upward into the bore y of the actuating member by the spring 9,

`ejecting the sirup from the pump cylinder as hereinbefore described.

' Preferably the bore of the actuating member isenlarged or Hared outwardly above its lower end to relieve the frictional contact of the pawls ywith the wall of the bore or vthe kquantity of sirup delivered may be corres ondingly regulated or varied.

ur preferred manner of constructing and mounting 1s to provide the cover member 5 l withy a tubular member or sleeve 15 having j an inturned annular flange 15'71 at its lower tor, which member 16 has a depending sleeve or cylindrical skirt 16a Which telescopically fits. the guide` flange 15 and which also encloses the upper end of spring 14.

In order to compel the operator to push the piston rod sufficiently far to make alfully stroke and insure the delivery at all times of the required or predetermined amount of,

sirup we provide means for automatically retaining the piston rod against return movement vuntil the limit of its inward movement has been reached. This is preferably accomplished by providing the cross head with 'a roller carrying recess within which is located a roller 18, the Wall of the recess adjacent the piston rod 7 having an opening through which a portion of the roller projects for contact with,y the piston rod, ywhile the opposite or back wall of the recess is inclined as indicated at 17 a. The roller is normally forced upward by a spring19 underlying thev roller which tends to wedge thelatter between the piston rod and said inclined wall. yA releasing pin 20 passes through a vertical opening inthe cross head and has its lower end bearing against the roller and its upper end or head in the path of movementof the lower face of the actuating member so that when the latter hasbeen pushed down far enough to cause a fullstroke of the piston the releasing pin is depressed which pushes the roller down and out of its wedging positionv and allows the piston rod to be freely *returned to initial position under the action of spring 9. f

It will be understood that the parts are so arranged that the pawls or dogs 7 a are forced inward into disengaging position just after the actuation of the releasing pin 2O. f We find it desirable to provide means for rotating the piston rod'during itsrectilinear vmovements and therebydistribute the wear due to theaction of the pawls on the upper end of the sleeve. A simple manner of efy fecting-thisis to provide the sleeve 12 with a helical internal groove 12a which has a tendency to effect such rotation. y

With a roller check means such as disclosed aslight upward inovementof the piston rod will take place before the roller actually grabs or binds the rod, and this movement would cause the delivery of a small amount of Sirup in the absence'of somev preventative therefor. `To avoid this we provide the invasie ing movement on 'therodas shownV in Fig. 1l.

be prevented.

To this end the'rod provided with a reduced portion 7b on its lower end which slidably engages a central` 'opening in the piston 6. The lower end of the 'rod'has a threaded recess which'is engaged 'by asc'rewf'c, the head of which' has an annular groove @which forms a .seat for' the lower end or' a compression 1 spring 2l whichnorm'allyholds 'the piston pressed up against the annular shoulder formed by the reduced portion 'or the rod. The springhowever, exerts such light pressure', that ifthe rod is allowed'by the operator to' inoveup before a 'full' stroke is made, the

piston will move downward on the rod by an amount equal to the upward movement orf the rodbefore the locking roller acts and thus delivery of sirup by such partialV strokewill l/Vhile we have described and illustrated with particularity what we consider as the referred embodiment oi our invention itwill be obviousV that various rchanges and modifications vcould be made without departing from the spirit of our invention. Y

Having thus described our invention what we claim is:

Y l. In a liquid dispensing pump, a piston, an endwise movable piston rod in permanent operative connection with the piston, an endwise movable piston rod actuating member having Xed hand control means, said piston rod and hand operated actuating member bemg normally operatively connected together for unitary movement, and means rendered operative during such unitary movement for disconnecting said'elements for reiative endwise movement.

2. In a liquiddispensing pump, a piston, an endwise ymovable Vpiston rod in `permanent operative connection vwith the piston, an endwise movable actuating rod having i'iXed hand control means, said actuating rod normally having actuating4 engagement with said piston rod, for unitary movement, and adjustable. means for eiiectingdisengagement of said rods at predetermined places in the unitary Yendwise movement thereof.

A liquid dispensing pump having ak piston and vpiston rod permanently and operatively connected together, spring means tending normally to holdsaid rod elevated, an actuating rod, spring ymeans for holding said actuating rod elevated, said vrrods being arranged to haveunitary and also' relative endwise movement, a dog normally connecting said yrods `for unitary movement, and means rendered operative by the unitary endwise movement for operating said dog to disengage said rods for relative endwise movement.

4. A liquid dispensing pump having a piston and piston rod permanently and operatively connected together, spring means tendina nermally to. held, Said rod elevated, an actuatingrod, spring means forgholding said actuatingk rod elevated, said rods being arranged to have unitary and also relative endwise movement, dog*A normal/lyl connecting said'rods for4 unitary movement, andadjustable means renderedfoperative by the` unitary endwise movement for operating saidl dog to disengageA Vsaid' rods forlrelative endwi'se movement; Y 5L in a liquid dispensing pump, an endwise movable piston rod,an endwise movable actuating rod, means normally connecting said rods for unitary movement, means rendered operative byV such unitary movementfor disconnecting said rodsfa'nd means external to the pistonrod Vfor positively locking the pistonV rod against 'return movement until it has moved' tothelimit' of its stroke; 6. In a liquid dispensing pump, a piston', a piston rod in permanent operative connection with the piston", an alined actuating rod havingiiXed hand control means, one of said rods having an abutment and the other dog means normally engaging said abutment to operatively connect said rods for'unitary movement, and means rendered operativel by s uch unitary movement for operating said dog means to permit relative movement of said rods.' l i i '7. ln a liquid dispensing pump, a piston, a piston rod in permanent operative connection with the piston, spring means ynormally elevating said rod, an actuating rod having a tubular bore to telescopically receive said rod, spring means tending normally to elevate said-actuating rod, a yieldable dog carried by said piston rod normally engaging a part on said actuating rod to connect ythe rods for unitary movement, andv means rendered operative by such unitary movement for moving said dog to release position. l

8: In a liquid dispensingpump, a piston, a piston rod 1n permanent operative connection with the piston, a v'spring normally holding said rod elevated, an actuating rod having telescopic relation to said piston rod, means tending normally to hold said actu` ating rod elevated, means normally connecting said. vrods for unitary movement, meansA rendered operative at the entremity of such unitary movement for disconnecting said rods for telescopic movement, means for positively locking the'piston rod against retrograde movement during such unitary movement, and means rendered operative by the completion of movement of the actuating rod for operating saidrlocking means to permit retrograde movement of the piston rod'.i

9. In avliquid dispensing; pump, a piston rod, springmeans'normally elevating said rod, an actuating member havingatubular bore to telescopically receive said rod, spring meanstending normally to elevate said actuating member, a yieldabledog carriedv by sie the piston rod and normally engaging a part on the actuating member to connect said elements for unitary movement, means rendered operative at the extremity of the unitary movement for moving said dog to release position, detent means normally engaging said piston rod to prevent retrograde movement thereof during such unitary movement and means operated by the actuating memberfor moving said detent means to release position substantially at the extremity of said unitary movement. y

V10. In a liquid dispensing pump a piston rod, an actuating rod having a tubular bore to telescopically engage said rod, spring means for holding both said rods normally elevated, a yieldable dog carried by the upper end of t-he piston rod and normally engaging a part on the actuating rod, aA stationary sleeve through which Ythe upper end of the piston rod passes, said yieldable dog having an inclined face to coact with the sleeve to move the dog to release position.

l1. In a liquid dispensing pump, a piston rod, an actuating rod having a tubular bore to receive the upper end of said rod, said piston rod having a recess adjacent its upper end, a yieldable dog located in said recess and normally projecting therefrom to abut a part onthevactuating rod, the projecting partrof said dog having an inclined face, and an adjustable member arranged in the path of said inclined face for moving the dog inward into the recess.

12. In a liquid dispensing pump, a piston rod, an actuating rod h. ving a tubular bore' to telescopically receive said rod, spring means tending to elevate said rods, .said piston rod having a recess, a yieldable dog located 1n said recess and normally projected therefrom to engage a part on the actuating rod, said dogy having an incline on its projecting face, a fixed part encircling said rod, an adjustable sleeve carried by said fixed part through which said piston rod passes, said adjustable sleeve cooperating with said inclined face of the dog. i

13. In a. liquid dispensing pump, a piston rod, an actuating rod having a tubular bore to telescopically receive said rod, spring .means tending to elevate said rods, said pis-r ton rod having a recess, a yieldable dog located in said recess and normally projected f therefrom to engage a part on the actuating rod, Said dog having an incline on its project- Ying face, a fixed part encircling said rod, an

adjustable `sleeve carried by said fixed part through which said piston rod passes, said adjustable .sleeve cooperating with ksaid inclined face of thevdog, and means for effecting rotation of the piston rod during its endwise movements.

14. In a liquid dispensing pump a piston rod, a Spring ytending normally to elevate said rod, an actuating rod, a spring tending ment facesaid piston rod having recesses adjacent its upper end, yieldable dogs located iny said recess and having parts normally projecting therefrom to 'engage said abutment face and having inclined side faces,

a fixed part, a sleeve carried by said fixed part to cooperate with the inclined facesy of the dogs, a roller detent carried by said fixed part positioned to normally engage said piston rod, and a push pin slidably carried by said fixed part and arranged to be operated by said downwardly facing abutment of the actuating rod for moving said roller detent to release position.

' l15, In a liquid dispensing pump, a pump cylinder, a piston, a piston rod, spring means tending normally to hold said rod'elevated, an actuating rod,spring means tending to hold ,thek same elevated, said `rods being arranged to have unitary and also relative endwise movement, a dog normally operatively connecting said rods for unitary movement, friction detent means normally engaging said piston rod to prevent retrograde movement during such unitary movement, means rendered operative at the vextremity of the unitary endwise movement for releasing said friction detent and dog. y

16.'In'a liquid dispensing pump, a pump cylinder having a Vclosed upper end provided with a liquid discharge outlet,y a check valve in said outlet, a piston rod `passing through said end, a valved piston mounted on said rod to have limited'movement lengthwise thereof, a spring tending to move said piston to the limit of its upward movement, spring means tending to elevate said piston rod, an actuating rod capable of telescopic movement relative to said piston rod, means normally connecting .said rods for unitary movement, means rendered operativeat the extremity of such movement for disconnecting said rods, detent means for preventing premature retrograde movement ofthe piston rod, and means rendered operative at the extremity of the unitary movement for releasing said detent means. j v

17. In a liquid dispensing pump according to claim 14a p/iston connected to said piston rod to have limited movement lengthwise thereof- In testimony whereof We raffix our signa- 

